JP2003222258A - Valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve device for a sampling valve, etc., whose assembling/disassembling work for washing is carried out rapidly and easily and also whose maintenance control is easy. <P>SOLUTION: This valve device is provided with a valve case 21 having an opening/closing port 28 and a plurality of supply and drain ports 27a and 27b communicating to the opening/closing port 28 and to each other, a valve body 22 for opening/closing the opening/closing port 28 by being moved forward/ backward in the axial direction through rotation, and a valve cap 25 rotatably supporting the valve body 22 and fixed to the valve case 21 through a clamp band 55. One end of the valve cap 25 is brought into contact with one end of the valve casing 21, and by tightening outer flanges 21b and 25b which are the contact parts by the clamp band 55, the valve cap 25 is removably fixed to the valve case 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used by being attached to a liquid tank in which a liquid is stored, a pipe through which a liquid flows, and the like, which is suitable for sampling the liquid, and two or more liquids. The present invention relates to a valve device such as a distribution valve that distributes to a branch pipe of the.

[0002]

2. Description of the Related Art Conventionally, milk, fruit drinks and other beverages, liquids such as culture liquids, reaction liquids and other chemicals are generally manufactured in the process of transporting these liquids to other processes. It is necessary to inspect the liquid components, characteristics, and contamination of unrelated bacteria. The inspection of the liquid is performed, for example, by periodically taking out the liquid from the middle of a liquid storage tank or a transportation pipe, and subjecting the taken-out liquid to a predetermined inspection to check the components, characteristics or characteristics of the liquid. Inspecting unrelated bacteria, etc. A valve device, which is a so-called sampling valve, is attached to the liquid outlet, and the liquid is taken out through the sampling valve.

As such a conventional sampling valve, for example, the one shown in FIG. 8 is known.
The sampling valve 1 and a valve case 2 having an opening / closing port 3 are moved forward and backward by being rotated to open / close the opening / closing port 3.
The valve main body 4 for opening and closing the valve main body 4, the valve cap 5 for rotatably supporting the valve main body 4, the valve nut 6 for fixing the valve cap 5 to the valve case 2, and the like.

The valve case 2 is made of a tubular member having a flange portion 2a at one end, and an opening / closing port 3 is provided at the center of the end portion of the axial hole 7 on the flange portion 2a side. Two branch pipe portions 8 and 9 are provided at a midway portion in the axial direction of the valve case 2 and project in a radial direction intersecting the axial direction. The radial holes 8 a and 9 a of the branch pipe portions 8 and 9 are communicated with the axial hole 7, respectively. And each branch part 8 and 9
Caps 10 are screwed into the tip ends of the caps 10, and a cap seal 11 is mounted inside each cap 10.

The valve body 4 is a valve head 4 for opening and closing the opening / closing port 3.
a and a valve body 4b continuous to one side of the valve head 4a
And a threaded shaft portion 4c continuous to the other side of the valve body portion 4b. The valve body 4 is housed in the axial hole 7 of the valve case 2 so as to be slidable in the axial direction, and is screwed to the valve cap 5 and supported so as to be capable of spiral movement.
Further, the valve cap 5 penetrates the central hole of the valve nut 6, and the valve cap 6 is attached to the valve body 4 by screwing the valve nut 6 onto the end of the valve body 4 opposite to the flange portion 2a. It is fixed.

Further, the handle 12 is fixed to the tip of the screw shaft portion 4c of the valve body 4 by a mounting nut 13. By rotating this handle 12, the valve body 4
Is integrally rotated, and the valve body 4 is moved forward or backward in the axial direction according to the rotation direction. As a result, the O-ring 14 mounted on the valve head 4a is fitted into the opening / closing opening 3 by the forward movement of the valve body 4, and the opening / closing opening 3
Will be closed. On the other hand, the O-ring 14 mounted on the valve head 4a is separated from the opening / closing opening 3 by the backward movement of the valve body 4, and the opening / closing opening 3 is opened.

In FIG. 8, reference numeral 15 is a main pipe through which the liquid to be sampled flows. The main pipe 15 is provided with an extraction pipe 16 for sampling the liquid, and a flange portion 16 a is formed at the tip of the extraction pipe 16. The flange portion 16a of the take-out pipe 16 is brought into contact with the flange portion 2a of the valve case 2, and the opening / closing port 3 is aligned with the take-out port 17. After that, both flange portions 2a, 16a
The sampling valve 1 is fixed to the take-out pipe 16 of the main pipe 15 by tightening with a clamp band 18.

[0008]

However, in such a conventional sampling valve, the valve cap 5 supporting the valve body 4 is detachably attached to the valve case 2 by tightening the valve nut 6. Was becoming. Therefore, disassembling / assembling work of the valve body 4, the valve cap 5 and the like is troublesome, and not only the workability at the time of disassembling / assembling is poor, but also when the tightening force of the valve nut 6 is too large at the end of the assembly, There is a problem that the O-ring 14 mounted on the head 4a may be damaged.

That is, in the work of attaching / removing the valve nut 6 to / from the valve case 2, it is necessary to rotate the valve nut 6 by the length over the entire pitch of the threaded portion provided on the valve nut 6. Therefore, since it takes a lot of time to rotate the valve nut 6, the disassembling and assembling work of the sampling valve 1 cannot be performed promptly, which is troublesome and time-consuming for cleaning and maintenance of the sampling valve 1. It was.

In particular, when the liquid to be sampled needs to be handled while maintaining a hygienic condition such as milk or fruit juice beverage, the sampling valve 1 must be disassembled.
Assembly work is frequently required (for example, cleaning once a day, cleaning every time the production line is stopped, etc.). Therefore, when the time required for one disassembly / assembly work of the sampling valve 1 is long, the total work time is increased by repeating the work, and a long time that cannot be ignored as a whole is used as extra work time. It was

Further, the valve nut 6 mounted on the valve case 2
When is rotated, the valve body 4 moves in the axial direction according to the amount of rotation. Therefore, for example, at the end of assembly,
When the final tightening is performed from the state where the O-ring 14 mounted on the valve head 4a is in light contact with the peripheral edge of the opening / closing port 3, the O-ring 14 is strongly pressed against the peripheral edge of the opening / closing port 3. Will be done. As a result, the O-ring 14 is compressed and twisted by the frictional force between the O-ring 14 and the contact surface, and there is a problem that the O-ring 14 is damaged when the deformation amount is large.

Further, since the valve nut 6 loosens naturally over time, it is necessary to occasionally tighten it to remove the looseness. In such a case, if the valve nut 6 is tightened, the O-ring 14 may also be twisted by the frictional force and damaged.

The present invention has been made in view of such conventional problems, and a sampling valve or the like which enables quick and easy disassembling / assembling work for cleaning work and the like and easy maintenance. It is intended to provide a valve device of.

[0014]

[Means for Solving the Problems] In order to solve the above-mentioned problems and the like, and to achieve the above-mentioned object, claim 1 of the present application
The valve device described above is a valve case that is connected to an opening / closing port and a plurality of supply / discharge ports that are in communication with each other, and a valve that opens and closes the opening / closing port by being swung back and forth in the axial direction. In a valve device including a main body and a valve cap that rotatably supports the valve main body and is fixed to the valve case via a fixing means, one end of the valve cap is brought into contact with one end of the valve case, It is characterized in that the valve cap is detachably fixed to the valve case by tightening the abutting portion with fixing means.

In the valve device according to the second aspect of the present application, the fixing means detachably connects between the pair of holding members whose one end is rotatably connected by the hinge means and the other ends of the pair of holding members. A clamp band having a clamp bolt and a clamp nut for

In the valve device according to the third aspect of the present application, the abutting portion is provided with positioning means composed of a convex portion and a concave portion which are fitted to each other for positioning between the valve case and the valve cap. Is characterized by.

In the valve device according to claim 4 of the present application, a ring-shaped sealing device formed of an elastic member is attached to the valve head for opening and closing the opening / closing port of the valve body, and the sealing device is used as the opening / closing port or The feature is that it is brought into contact with the vicinity of the opening / closing port.

In the valve device according to claim 5 of the present application, a cap-shaped sealing device formed of an elastic member is attached to the valve head portion for opening and closing the opening / closing port of the valve body, and the sealing device is used as the opening / closing port or The feature is that it is brought into contact with the vicinity of the opening / closing port.

The valve device according to claim 6 of the present application is characterized in that the valve head portion for opening and closing the opening / closing port of the valve body is configured to be detachable from the valve body.

The valve device according to claim 7 of the present application is characterized in that the valve head is formed of a material softer than the material of the valve case forming the opening / closing port.

The valve device according to claim 8 of the present application is characterized in that a plurality of supply / discharge ports of the valve case are detachably provided with transparent see-through tubes through which the inside can be seen.

The valve device according to claim 9 of the present application is characterized in that at least a plurality of supply / discharge ports of the valve case are formed of a transparent material through which the inside can be seen.

With the above construction, in the valve device according to the first aspect of the present application, one end of the valve cap and one end of the valve case are brought into contact with each other and tightened and fixed by the fixing means to clean. It is possible to provide a valve device in which disassembly / assembly work for work or the like can be performed quickly and easily and maintenance and management are easy.

In the valve device according to the second aspect of the present application, as the fixing means, a pair of holding members connected by a hinge means and a clamp band having a clamp bolt and a clamp nut can be used. The fastening work between the cap and the valve case and the releasing work thereof can be performed easily and quickly.

In the valve device according to the third aspect of the present application, by providing the abutting portion with the positioning means composed of the convex portion and the concave portion that are fitted to each other, the valve portion can be sandwiched by the fixing means. It is possible to prevent the positional deviation between the case and the valve cap and prevent damage to the sealing device.

In the valve device according to the fourth aspect of the present application, the ring-shaped sealing device mounted on the valve head abuts the opening / closing opening or the vicinity of the opening / closing opening, so that the opening / closing opening can be reliably sealed. it can.

In the valve device according to the fifth aspect of the present application, the cap-shaped sealing device mounted on the valve head abuts on the opening / closing opening or in the vicinity of the opening / closing opening, so that the opening / closing opening can be reliably sealed. it can.

In the valve device according to claim 6 of the present application, the valve head is configured to be attachable to and detachable from the valve body, so that only the valve head is closed when the sealing performance of the opening / closing port by the valve body deteriorates. Can be dealt with by exchanging, and high sealing performance can be easily maintained.

In the valve device according to the seventh aspect of the present application, the material of the valve head is made of a softer material than the material of the valve body having the opening / closing port, so that the valve head has a high sealing performance of the opening / closing port. Can be secured.

In the valve device according to claim 8 of the present application, by providing transparent see-through tubes at a plurality of supply / discharge ports of the valve case, the inside of the see-through tubes can be seen through, and therefore the transparent case is transparent. The presence or absence of liquid inside can be visually recognized through the fluoroscope.

In the valve device according to claim 9 of the present application, by forming the whole or at least a plurality of supply / discharge ports of the valve case with a transparent material, it is possible to directly see through the inside of the valve case and therefore see. The presence or absence of liquid in the valve case can be visually recognized directly.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 7 show an embodiment of the present invention. That is, FIG. 1 is a vertical cross-sectional view of a sampling valve showing a first embodiment of the valve device of the present invention.
1 is a sectional view taken along line XX of FIG. 1, FIGS. 3A and 3B are plan views and sectional views showing a second embodiment of the valve body, and FIGS. 4A and 4B are plan views showing a third embodiment of the valve body. Sectional drawing, FIG. 5 is a vertical sectional view showing a second embodiment of the sampling valve of the valve device of the present invention, FIG. 6 is a vertical sectional view showing a third embodiment of the sampling valve of the present invention, and FIG. It is a longitudinal section showing the 4th example of the sampling valve of the invention.

As shown in FIGS. 1 and 2, the sampling valve 20 showing the first embodiment of the valve device of the present invention comprises a valve case 21, a valve body 22, a valve cap 25 and a handle 2.
6 and the like. The valve case 21 is made of a tubular member having outer flanges 21a and 21b which are radially outwardly extended on both ends thereof, and an axial hole 27 is formed at a central portion thereof. Further, the inner end of the inner flange 21 that is radially inwardly extended at one end of the valve case 21 in the axial direction.
c is provided, and an opening / closing port 28 having a smaller diameter than the other portions is set at one end of the axial hole 27 by the inner flange 21c.

A valve seat 28a having a tapered surface is provided between the opening / closing port 28 and the axial hole 27. This valve seat 2
The valve head of the valve body 22 is brought into contact with 8a, so that the opening / closing port 28 is closed. Further, two pipe-shaped branch pipe portions 30 and 31 projecting in the radial direction intersecting the axial direction are provided in the axially intermediate portion of the valve case 21. The two branch pipe portions 30 and 31 are arranged so as to face each other in the diametrical direction, and radial holes 27 a and 27 b, which are supply / discharge ports penetrating the central portions of the branch pipe portions 30 and 31, respectively, and the axial hole 27. It is in communication.

Threaded portions 30a and 31a are provided at the tips of the branch pipe portions 30 and 31, respectively. A cap 33 with a hole in which a blind plug 32 is mounted is screwed into each of the screw portions 30a and 31a. Cap with hole 3
3 has a form in which a through hole 33a is provided at the closed end of the cap nut, and the blind plug 32 is fitted in the through hole 33a. The blind plug 32 has a flange portion 32a having a diameter larger than that of the through hole 33a.
Is designed to be prevented from coming off from the through hole 33a. An O-ring 34 is arranged inside the flange portion 32a. These two caps 33 with holes are
It is screwed to a and 31a and fixed by tightening.

The valve body 22 includes a valve body 23 and a valve rod 2.
4 and. The valve body 23 is composed of a shaft-shaped member in which a valve head portion 23a, a valve body portion 23b, and a cylinder shaft portion 23c are integrally provided. Valve head 23a of valve body 23
Is formed at one end in the axial direction and has a central valve body portion 23b.
A cylindrical shaft portion 23c is formed on the opposite side of the shaft. The valve body 23 is inserted into the axial hole 27 so that the valve head portion 23a faces the opening / closing port 28, and is slidably fitted into the axial hole 27 by the valve body portion 23b.

Further, the valve head portion 23a of the valve body 23 has a tapered truncated cone shape, and the taper surface portion thereof is provided with a head annular groove 35a continuous in the circumferential direction. A ring-shaped O-ring 36 showing a specific example of the sealing device and a seat ring 37 for preventing the O-ring 36 from being twisted are attached to the head annular groove 35a. The outer circumference of the O-ring 36 is the head annular groove 3 over the entire circumference.
The seat ring 3 is formed so as to protrude from the 5a, and the rear side of the O-ring 36 (the side far from the opening / closing opening 28).
7 are arranged.

Thus, when the valve body 23 moves to the opening / closing port 28 side, only the outer peripheral edge of the O-ring 36 is brought into contact with the valve seat 28a of the valve case 21 over the entire circumferential direction, whereby the opening / closing port 28 is opened. Will be closed. The seat ring 37 reduces the frictional force when the O-ring 36 is pressed against the valve seat 28a, and prevents the O-ring 36 from being twisted and damaged.

Further, in the valve body portion 23b of the valve body 23,
A body annular groove 35b that is continuous in the circumferential direction is provided.
The O-ring 3 which is a sealing device is provided in the body annular groove 35b.
8 and a seal ring 39, which is also a sealing device, are attached. The O-ring 38 is used to allow the valve body 23 to move in the axial direction while ensuring a certain sealing effect. The seal ring 39 is O
It has the role of reducing the frictional force generated in the ring 38 and preventing the O-ring 38 from being twisted by the frictional force and being damaged when the valve body 23 moves.

The cylinder shaft portion 23c of the valve body 23 is the valve body portion 23.
The diameter is smaller than the diameter of b, and the cylindrical portion 25a of the valve cap 25 is fitted in the cylindrical space formed between the cylindrical shaft portion 23c and the valve case 21. Further, the cylinder shaft portion 23
A key groove extending in the axial direction is provided on the outer peripheral surface of c, and a key 40 is fitted in the key groove. A screw hole 41 extending in the axial direction and reaching the valve body portion 23b is provided in the axial center portion of the cylindrical shaft portion 23c.

The valve rod 24 of the valve body 22 has a main screw portion 2
4a and three shaft portions 24b, 24c and 2 having different diameters
4d and the screw part 24e are integrally formed of a shaft-shaped member. The main screw portion 24 a of the valve rod 24 is formed at one end in the axial direction and is screwed into the screw hole 41 of the valve body 23. The main screw portion 24a includes three shaft portions 24b ...
The large-diameter shaft portion 24b having a large diameter is connected to the large-diameter shaft portion 24d, and the medium-diameter shaft portion 24c is continuous to the large-diameter shaft portion 24b. A small-diameter shaft portion 24d is continuous next to the medium-diameter shaft portion 24c, and a screw portion 24e having a smaller diameter than the small-diameter shaft portion 24d is formed at the other end in the axial direction adjacent to the small-diameter shaft portion 24d. Has been done.

The valve rod 24 having such a structure is
It is rotatably supported by the valve cap 25. The valve cap 25 is made of a ring-shaped member through which the valve rod 24 is inserted, and the valve rod 24 is inserted through a central hole thereof. The central hole of the valve cap 25 includes a small diameter hole 42a through which the medium diameter shaft portion 24c of the valve rod 24 is inserted, and a small diameter hole 42a.
a, which is continuous with a and is provided on the cylindrical portion 25a side
b and a large diameter hole 42c which is continuous with the small diameter hole 42a and is provided on the opposite side of the medium diameter hole 42b. Medium diameter hole 4
A seal ring 43 is fitted in 2b, and a seal ring 44 is fitted in the large diameter hole 42c.

The medium diameter shaft portion 24c of the valve rod 24 is inserted through these seal rings 43, 44, the large diameter shaft portion 24b is inserted into the medium diameter hole 42b, and the small diameter shaft portion 24d is inserted into the cylindrical portion 2.
5a is projected to the opposite side. Further, the cylindrical shaft portion 23c of the valve body 23 is slidably fitted in the medium diameter hole 42b, and the key groove 45 for engaging with the key 40 attached to the cylindrical shaft portion 23c has a medium diameter. It is provided in the hole 42b.
The combination of the key 40 and the key groove 45 allows the valve body 23 to move linearly only in the axial direction with respect to the valve cap 25. On the other hand, the valve rod 24 is rotatably supported by the valve cap 25.

A handle 26 for rotating the valve rod 24 is attached to the small-diameter shaft portion 24d of the valve rod 24. The handle 26 is made of a disk-shaped member having a grip portion on one end surface side of the boss portion, and a through hole 26a through which the small-diameter shaft portion 24d is inserted is provided in the central portion thereof. Since the handle 26 and the valve rod 24 are integrated in the rotating direction, the half-moon key 4 is attached to the small-diameter shaft portion 24d.
6 is fixed, while the through hole 26a of the handle 26 is
Has a key groove 47 with which the half-moon key 46 is engaged. The handle 26 is tightened and fixed by a mounting nut 48 screwed to the screw portion 24e. A spring washer 49 is arranged inside the mounting nut 48, and the spring washer 49 prevents the handle 26 from loosening.

Further, the valve cap 25 is positioned by a positioning means composed of a convex portion and a concave portion which are fitted to each other, and is constructed so as not to rotate with respect to the valve case 21. The positioning means of the valve cap 25 includes a pin 50 showing a concrete example of a convex portion and an engagement hole 51 showing a concrete example of a concave portion.
The pin 50 is fixed to the end surface of the valve case 21 on the outer flange 21b side by fixing means such as press fitting, and the engagement hole 51 with which the pin 50 is engaged has an end surface on the cylindrical portion 25a side of the valve cap 25. It is provided in.

The valve cap 25 has an outer flange 25b corresponding to the outer flange 21b of the valve case 21, and the valve cap 25 is formed by these outer flanges 21b and 25b.
A contact portion that abuts one end of the valve case with one end of the valve case 21. On the respective end faces of the outer flanges 21b and 25b, annular grooves 53a and 52 that are continuous in the circumferential direction are provided. Both annular grooves 53 aligned with each other
An O-ring 54, which is a sealing device, is installed in the gap formed by a and 52. Further, the valve case 21
An annular groove 53b similar to the annular groove 53a is also provided on the end surface of the other outer flange 21a.

The valve cap 25 is detachably fixed by a clamp band 55, which is a specific example of fixing means. As shown in FIGS. 1 and 2, the clamp band 55 includes a pair of holding members 56 and 57 that are rotatably connected by a hinge means, and a clamp bolt that detachably fixes the pair of holding members 56 and 57. 58 and a clamp nut 59 and the like.

The pair of holding members 56, 57 are arc-shaped members which are semicircular with each other, and bearing portions 56a, 57a are provided at one end in the arc direction, and the attachment / detachment portion 56b. 57b is provided. The bearing portion 56a of the first holding member 56 is bifurcated, while the bearing portion 57a of the second holding member 57 has a shape that loosely fits into the bearing portion 56a. A connecting shaft 60a is loosely penetrated through the bearing portion 57a, and both ends of the connecting shaft 60a are caulked by the bearing portions 56a to form a hinge means. A pair of clamping members 56, 57 is provided via the hinge means.
Are rotatably connected.

Further, the attachment / detachment portions 56b. 57b has slits 61a. 61b is provided. Both ends of a support shaft 60b, which is loosely inserted into a through hole of the clamp bolt 58, is supported by the slit 61a of the first holding member 56. The clamp bolt 58 is composed of a screw member having an eyeball portion 58a on one side, and is rotatable around a support shaft 60b inserted in the eyeball portion 58a. The screw portion 58b of the clamp bolt 58 is screwed into the nut portion 59a of the clamp nut 59.

The clamp nut 59 has an operating portion 59b formed continuously on one side of the nut portion 59a, and the operating portion 59b is a frame so as to surround the screw portion 58b. Further, the inner surfaces of the pair of clamping members 56, 57 are V-shaped so as to correspond to the shapes of the pair of outer flanges 21b, 25b, which are the contact portions, so that the contact portions can be reliably clamped. ing.

The material of the valve case 21, the valve body 23, the valve rod 24, the valve cap 25 and the handle 26 described above is, for example, stainless steel (SUS304, SUS304, 31).
6, 316L, etc.) is suitable, but it goes without saying that carbon steel and other metals can be used, and engineering plastics other than metals can be applied. Also, clamp band 55, key 40, half-moon key 4
6, carbon steel, tool steel or the like can be used as the material of the cap 33 with holes and the mounting nut 48.

In addition, the seat ring 37 and the seal ring 3
The material of 9, 43, 44 varies depending on the type of fluid used, but for example, tetrafluoroethylene resin,
Other engineering plastics can be applied. Further, the blind plug 32, the O-rings 34, 36, 3
Although the material of 8, 54 varies depending on the type of fluid used as well, for example, silicone rubber, other rubber-like elastic bodies, plastics or the like can be applied.

The sampling valve 20 having such a structure is used by being attached to, for example, the main pipe 60 shown in FIG. 1 in which a liquid is flowing, a liquid tank (not shown) in which the liquid is stored, and other liquid devices. It Main piping 6
0 is used for the purpose of producing milk, fruit juice drinks and other beverages, liquid chemicals such as culture liquid and reaction liquid, and other liquids, or transporting those liquids to other processes. Is.

The sampling valve 20 attached to the main pipe 60 as described above periodically or arbitrarily takes out and samples the liquid flowing through the main pipe 60, inspects the components and characteristics of the liquid, or other irrelevant bacteria. It is used to inspect for contamination and the like. A mounting pipe 61 is provided in the main pipe 60 for mounting the sampling valve 20. The attachment pipe 61 is attached so as to protrude laterally in the middle of the main pipe 60 in the longitudinal direction, and an outer flange 61a similar to the outer flange 21a of the valve case 21 is provided at the tip thereof. .

An outer flange 61a of the mounting pipe 61 is provided with an inner flange 61b which is expanded radially inward, and an outlet 62 is formed inside the inner flange 61b. The outlet 62 of the mounting pipe 61 has a shape corresponding to the opening / closing port 28 of the valve case 21. Then, on the end surface of the outer flange 61a, the annular groove 5 of the outer flange 21a is formed.
Similar to 3b, an annular groove 63 that is continuous in the circumferential direction is provided. By bringing the outer flange 21a into contact with the outer flange 61a, a ring-shaped gap having a circular cross section formed of the annular groove 53b and the annular groove 63 is formed, and an O-ring 64 is mounted in the gap to prevent leakage of liquid. It is being prevented.

The sampling valve 20 having the above structure is assembled, for example, as follows. First, the O-ring 36 and the seat ring 37 are mounted in the head annular groove 35a of the valve body 23. Similarly, an O-ring 38 and a seal ring 39 are attached to the body annular groove 35b of the valve body 23. Then, the key 40 is mounted in the key groove of the valve body 23. In the screw hole 41 of this valve body 23,
The main screw portion 24a of the valve rod 24 is screwed.

Next, the shaft portions 24b to 24d of the valve rod 24.
Through the medium diameter hole 42b of the valve cap 25,
2b is attached to the seal ring 43 and the small diameter hole 42
a and the seal ring 44 mounted in the large diameter hole 42c
The screw portion 24e and the small-diameter shaft portion 24d are passed through. At this time, the key 40 is engaged with the key groove 45 of the cylindrical portion 25a. Thereby, the valve body 23 with respect to the valve cap 25
Is prevented from rotating relative to each other, and is allowed to move only in the axial direction by being guided by the key groove 45.

Next, the half-moon key 46 is attached to the small-diameter shaft portion 24d of the valve rod 24, the half-moon key 46 is aligned with the key groove 47, and the handle 26 is attached to the small-diameter shaft portion 24d. Then, after mounting the spring washer 49, the mounting nut 48 is screwed into the screw portion 24e. The handle 26 is fixed to the valve rod 24 by tightening the mounting nut 48. This prevents the valve rod 24 from moving in the axial direction with respect to the valve cap 25, and allows only rotational movement.

Next, the valve body 23 supported by the valve cap 25 is inserted into the axial hole 27 of the valve case 21 from the valve head 23a side. Following this valve body 23, the cylindrical portion 25a is fitted into the axial hole 27, and the pin 5
The position of the engaging hole 51 is adjusted to 0. At this time, the O-ring 54 is interposed between the outer flanges 21b and 25b, and the outer flanges 21b and 25b are opposed to each other via the O-ring 54. The contact portions of the outer flanges 21b and 25b are fixed by a clamp band 55.

At this time, in the clamp band 55, as shown by the chain double-dashed line in FIG. 2, the clamp nut 59 is loosened, the clamp bolt 58 is tilted to the side, and the screw portion 58b is removed from the one detachable portion 57b. . Then, the pair of holding members 56, 57 are wound around the pair of outer flanges 21b, 25b, and the V-grooves on the inner surface of the outer flanges 21b, 2
Hold the outer peripheral edge of 5b. After that, the clamp bolt 58
After inserting the clamp nut 59 into the slit 61b of the one detachable portion 57b, the clamp nut 59 is tightened. As a result, the pair of holding members 56, 57 are tightened via the attachment / detachment portions 56b, 57b, and the valve cap 25 is fixed to the valve case 21.

In this case, the valve cap 25 is attached to the valve case 21.
In order to fix it to the clamp bolt 55, after winding the clamp band 55 around the pair of outer flanges 21b and 25b,
Since it is only necessary to raise 8 and tighten the clamp nut 59, the fixing work can be performed extremely quickly and smoothly in a short time. Moreover, the valve cap 25 hardly moves in the axial direction of the valve rod 24 due to the tightening of the clamp band 55.

Therefore, when the clamp band 55 is tightened, even when the O-ring 36 mounted on the valve head 23a is in contact with the valve seat 28a, the O-ring 36 moves in the axial direction to increase the load. Moreover, the O-ring 36 is not rotated and a twisting force is not applied. Therefore, when the sampling valve 20 is assembled, there is no risk that the O-ring 36 will be damaged or twisted off by tightening the clamp band 55 or the like. Therefore, the disassembly / assembly work of the sampling valve 20 can be safely and easily performed.

The two branch pipe portions 30 of the valve case 21 are
A cap 33 with a hole in which a blind plug 32 and an O-ring 34 are attached may be preliminarily attached to each of the screw portions 30a and 31a of 31, and the cap 33 with a hole is attached later at the end of assembly. It may be allowed to.

The sampling valve 20 is detachably attached to the attachment pipe 61 by the clamp band 55, as in the case of attaching the valve cap 25 to the valve case 21. First, the outer flanges 21a and 61a are opposed to each other with the O-ring 64 interposed therebetween.
A clamp band 55 is wound around the contacting portions of a and 61a. Next, after inserting the clamp bolt 58 into the slit 61b of the one detachable portion 57b, the clamp nut 59 is tightened. As a result, the pair of holding members 56 and 57 are tightened via the clamp band 55, and the sampling valve 20 is fixed to the main pipe 60.

FIG. 1 shows a state in which the liquid flowing through the main pipe 60 is not sampled. In this state, the opening / closing port 28 of the sampling valve 20 is closed by the valve head 23a of the valve body 22. At this time, the valve head 23
The O-ring 36 attached to a is closely attached to the valve seat 28a of the valve case 21. Therefore, the liquid that has entered the take-out pipe 61 of the main pipe 60 is filled from the take-out port 62 to the opening / closing port 28, but the O-ring 36 keeps the liquid-tightness of the opening / closing port 28.

In the state where the opening / closing port 28 is closed in this manner, the holed cap 33 of the branch pipe portion 30 above the sampling valve 20 is removed, and a sterilizing liquid such as alcohol is injected into the valve case 21 through the upper radial hole 27a. Inject.
Then, the axial hole 27 of the valve case 21 and the upper and lower radial holes 27a and 27b are filled with a sterilizing liquid, and the upper branch pipe portion 30 is closed again with the cap 33 with a hole.

This is the state before the sampling liquid is taken out. In this state, the axial hole 27 of the valve case 21 is
The surface between the O-ring 36 mounted on the valve head 23a of the valve body 23 inside and the O-ring 38 mounted on the valve body 23b, and the inner surface of the hole, and the upper and lower radial holes 27a, 27b. Each inner surface of the is constantly exposed to the sterilizing solution. Therefore, the portion that is constantly in contact with the sterilizing solution is always in the sterilized state, and the inside of the sampling valve 20 is not contaminated.

When it is desired to take out the sampling liquid from this state, for example, it is performed as follows. First, the caps with holes 33 are removed from the upper and lower branch pipes 30 and 31, respectively, and the sterilizing liquid inside is withdrawn. Next, hot air is blown into the valve case 21 through the radial hole 27a of the one branch pipe portion 30 to evaporate the alcohol adhering to the inner surface of the axial hole 27, the surface of the valve body 23 and the like. Further, steam may be caused to flow into the radial hole 27a to wash away the sterilizing liquid, and further, a flame may be put into the radial hole 27a to burn off the alcohol.

After sterilizing the inside of the sampling valve 20 in this way, the hole caps 33 are attached to the branch pipe portions 30 and 31, respectively, to close the radial holes 27a and 27b. Then, turn the handle 26 to turn the valve body 2
3, the O-ring 36 is moved away from the valve seat 28a to open the opening / closing port 28. As a result, the main pipe 6
The liquid in 0 enters the axial hole 27 from the outlet 62 through the opening / closing port 28 and discharges air to the main pipe 60 side.
As a result, the space inside the valve case 21 is filled with the sampling liquid, which allows the liquid in the main pipe 60 to be sampled and taken out by a predetermined amount.

In this case, since each surface of the space filled with the sampling liquid is sterilized by a sterilizing liquid such as alcohol, unnecessary bacteria do not enter the sampling liquid taken out, and the liquid is contaminated by the sampling. Can be prevented. Therefore, since unnecessary bacteria such as miscellaneous bacteria are not mixed in at the time of sampling, it is possible to inspect the accurate components and characteristics of the liquid flowing through the main pipe 60. The space inside the valve case 21 after the sampling liquid is taken out is again sterilized by using a sterilizing liquid such as alcohol. The sterilization work of the space in the valve case 21 is as described above.

When such a sampling valve 20 is used for a transportation pipe or the like in a milk production line, for example, the valve itself must always be maintained in a hygienic state. Therefore, the sampling valve 20 in the production line is disassembled at regular intervals (for example, after one day of manufacturing work is completed) or as needed (for example, after the production line is stopped for a predetermined time). It is necessary to clean each part and keep it in a hygienic condition.

The disassembling and cleaning operation of the sampling valve 20 is performed as follows, for example, in a milk production line after the milk production for one day is completed and the milk tank, the transportation pipe, etc. are cleaned. First, after removing the clamp band 55 fixing the valve cap 25 to the valve case 21, the valve body 22 is pulled out from the valve case 21 together with the valve cap 25. Next, the clamp band 55 that fixes the valve case 21 to the mounting pipe 61 is removed, and the valve case 21 is separated from the mounting pipe 61.

As a result, the valve body 22 is divided into one block in which the valve cap 22 is assembled and one block in which two hole caps 33 are attached to the valve case 21. When these blocks are simply washed, for example, each block is immersed in an alcohol liquid or the alcohol liquid is sprayed on each block like a shower to wash the surface of each block.
As a result, the axial hole 27 of the valve case 21 and the radial hole 2
Liquids (milk etc.) adhering to the inner surfaces of 7a and 27b, the surface of the valve body 22, etc. can be washed away, and these can always be maintained in a hygienic state.

At this time, when cleaning each block in detail, in the case of a valve cap block, this is used for the valve body 2.
3, valve rod 24, valve cap 25 and handle 26. Then, each component such as the valve body 23 is individually cleaned. Further, in the case of a valve case block, this is divided into a valve case and two caps with holes 33, and each component is individually washed.

The components thus washed can be easily assembled in the reverse order of the disassembling work order. Particularly, when each block is washed, the valve body 23 is inserted into the axial hole 27 of the valve case 21, the cylindrical portion 25a of the valve cap 25 is fitted into the opening of the axial hole 27, and the outer flange is formed. The engagement hole 51 of 25b is engaged with the pin 50 of the outer flange 21b. After that, the clamp band 55 is wound around the contact portion where the outer flanges 21b and 25b face each other, and the clamp nut 59 is rotated to tighten the pair of holding members 56 and 57. By using the clamp band 55, the valve cap 25 can be fast and surely fixed to the valve case 21. The same applies to the work of mounting the sampling valve 20 on the mounting pipe 61.

As described above, in this embodiment, the valve cap 25
Since the clamp band 55 is used to fix the valve cap 21 to the valve case 21,
Also, the work of attaching / detaching the valve body 22 can be performed quickly, easily and surely. Further, when the clamp band 55 is tightened, the force acting on the contact portion from the pair of holding members 56 and 57 is a force directed from the outer side to the inner side in the radial direction over substantially the entire circumference thereof. Therefore, a force in the axial direction is not generated in the valve main body 22 due to the tightening force of the clamp band 55, so that the O-ring 23a attached to the valve head 23a is pressed against the valve seat 28a and twisted. There is no possibility of causing problems such as cutting.

On the other hand, in the sampling valve shown in FIG. 8 having the screw method which has been conventionally considered as the best fixing method, the valve cap 5 for supporting the valve body 4 in a spiral motion is provided with the valve nut. Since the structure is fixed to the valve case 2 by 6, the moving force in the axial direction is generated in the valve body 4 according to the rotation amount of the valve nut 6 when the valve nut 6 is tightened. As a result, the O-ring 14 mounted on the valve head 4a is twisted while being pressed against the corners and slopes of the opening / closing port 3, so that the O-ring 14 may be completely twisted. However, in the present invention, the above-described effects can be obtained without causing such a problem.

FIGS. 3A and 3B and FIGS. 4A and 4B show another embodiment of the valve body 23 shown in the above embodiment.
The valve body 66 according to the second embodiment shown in FIGS.
The valve head 66a is covered with a cap-shaped sealing device formed of an elastic member. The valve body 66 has substantially the same configuration as the valve body 23, and has a valve head portion 66a provided at one end in the axial direction, a valve body portion 66b continuous with the valve head portion 66a, and a valve body portion. It is composed of a cylindrical shaft portion 66c continuous to the side opposite to the valve head portion 66a of 66b, and a head cover 67 showing a second specific example of the sealing device.

The valve body portion 66b and the cylinder shaft portion 6 of the valve body 66.
6c is a valve body portion 23b and a cylinder shaft portion 23c of the valve body 23.
And an annular groove 68a that is continuous in the circumferential direction is provided on the outer peripheral surface of the valve body 66b.
A key groove 68b extending in the axial direction is provided on the outer peripheral surface of the cylindrical shaft portion 66c having a diameter slightly smaller than that of the valve body portion 23b. An O-ring 38 and a seal ring 39 are mounted in the body annular groove 68a, and a key 40 is engaged in the key groove 68b. A screw hole 72 extending in the axial direction is opened in the end surface on the side of the cylinder shaft portion 66c, and the main screw portion 24a of the valve rod 24 is screwed into the screw hole 72.

The valve head 66a of the valve body 66 has the valve body 6
It consists of a sphere having a shaft portion 66d connected to 6b, and the sphere portion at the tip is covered with a head cover 67.
The head cover 67 is a spherical shell-shaped member that can cover the entire spherical portion and is provided with an opening 67a. The circumference of the opening 67a of the head cover 67 is made thicker than the other portions, so that the rigidity is higher than that of the other portions and the escape of the spherical portion is suppressed.

According to the head cover 67, the spherical portion on the tip end side is brought into contact with the opening / closing port 28 of the valve case 21 or the valve seat 28a around it. As a material of the head cover 67, a rubber-like elastic body or a synthetic resin, which is relatively soft and excellent in sealing property and resistant to heat and chemicals, such as silicon rubber and fluororesin, is suitable.

In the valve body 70 according to the third embodiment shown in FIGS. 4A and 4B, the valve head 70a is detachably attached to the valve body 70b, and only the valve head 70a is replaceable. Is. The valve body 70 has substantially the same configuration as the valve body 23, and includes a valve head portion 70a, a valve body portion 70b, and a cylinder shaft portion 7.
0c and 0c.

The valve body portion 70b and the cylinder shaft portion 7 of the valve body 70.
0c is the valve body portion 23b and the cylinder shaft portion 23c of the valve body 23.
The valve body 70b is provided with a body annular groove 71a on the outer peripheral surface thereof, and the cylindrical shaft portion 70c is provided with a key groove 71b on the outer peripheral surface thereof. Body annular groove 71
An O-ring 38 and a seal ring 39 are attached to a,
The key 40 is engaged with the key groove 71b. A screw hole 72a extending in the axial direction is opened in the end surface on the cylinder shaft portion 70c side.

[0084] valve valve head 70a of the body 70 with is formed in the shell type shape, the threaded shaft portion 70a ₁ for screwing the connecting shaft portion 70d of the valve body 70b is provided. By screwing the threaded shaft portion 70a ₁ into the screw hole 72b of the connecting shaft portion 70d, the valve head 70a is detachably attached to the valve body 70b.

In the valve head 70a, the spherical portion at the tip is brought into contact with the opening / closing port 28 of the valve case 21 or the valve seat 28a around it. As a material of the head cover 67, a synthetic resin or a rubber-like elastic body, which is relatively hard and excellent in sealing property and resistant to heat and chemicals, such as tetrafluoroethylene resin and silicon resin, is suitable, but other materials. Not only engineering plastics can be applied, but also rubber-like elastic bodies such as silicone rubber can be used.

5 to 7 show the second, third and fourth embodiments of the sampling valve according to the present invention. In these embodiments, the same parts as those in FIG. 1 are designated by the same reference numerals, and overlapping description will be omitted.

The sampling valve 74 according to the second embodiment shown in FIG. 5 is the sampling valve 20 shown in FIG.
A transparent see-through tube 75 is connected to the two branch pipe portions 30 and 31 so that the sterilizing liquid filled in the valve can be seen from the outside. The see-through tube 75 is
It is made of a transparent pipe-shaped member having an outward flange portion 75a provided at one end in the axial direction, and an opening portion at the other end is openably and closably closed by an opening / closing plug 76.

The transparent tube 75 is made of a colorless or colored transparent material, which has excellent sealing properties and is resistant to heat and chemicals, such as synthetic resin or rubber-like elastic material, for example, tetrafluoroethylene resin or silicone. Resin or the like is preferable. However,
Not only other engineering plastics can be applied as the see-through tube 75, but also a rubber-like elastic body such as silicon rubber can be used.

The see-through tube 75 can be used in place of the blind plug 32 of the cap 33 with a hole. That is, after removing the blind plug 32 of the hole cap 33, the through hole 33a
Then, the transparent tube 75 is inserted from the side opposite to the flange portion 75a. As a result, the flange portion 75a is engaged with the peripheral edge of the through hole 33a and is prevented from coming off. When the see-through tube 75 is used, the inside of the valve can be visually checked from the outside, and therefore the operator can directly visually recognize whether the sterilizing liquid or the sampling liquid is present in the valve.

The sampling valve 77 according to the third embodiment shown in FIG. 6 is the sampling valve 20 shown in FIG.
The valve case 21 of is composed of a transparent valve case 78,
The inside of the sampling valve 77 can be seen from the outside. As a material for the valve case 78, a colorless or colored transparent material, which is excellent in sealing property and resistant to heat and chemicals, such as a synthetic resin such as tetrafluoroethylene resin is suitable. However, it goes without saying that other engineering plastics can be applied as long as they can be made transparent.

The openings of the radial holes 27a, 27b of the branch pipes 79a, 79b of the valve case 78 are closed by an opening / closing plug 76a so as to be opened and closed. The valve body 23 b of the valve body 23 has two body annular grooves 35.
b and 35c are provided. These body annular grooves 35
An O-ring 38 and a seal ring 39 are attached to b and 35c, respectively. In this way, 2 of the valve body 23b
By providing the seal portion at the location, it is possible to improve the sealability and effectively prevent or suppress the liquid from entering the cylinder shaft portion 23c side.

According to the sampling valve 77 of the third embodiment, the inside of the valve case 78 can be visually inspected from the outside, so that the operator can check whether the sterilizing liquid or the sampling liquid exists in the valve. You can see and recognize it directly. Note that it is also possible to form only a part of the valve case 78 with a transparent material so that the inside can be partially seen through. For example, two-color molding may be performed using a plastic material, and only the branch pipe portions 79a and 79b may be formed transparent, or only the portions excluding the branch pipe portions 79a and 79b may be formed transparent.

The sampling valve 80 according to the fourth embodiment shown in FIG. 7 is the sampling valve 20 shown in FIG.
2 is provided with a valve case 81 instead of the valve case 21 in FIG.
The opening portions of the individual branch pipe portions 82a and 82b are configured to be openably and closably closed by using a lid 83 and a clamp band 84.

The branch pipe portions 82a and 82b of the valve case 81 are formed to be long, and the outer flanges 85a and 21b, which are smaller than the outer flanges 21a and 21b, are formed in their openings.
a and 85b are provided. The lid 83 is made of a disk-shaped member having an outer peripheral edge of one surface as a tapered surface, and the other surface is provided with an annular groove 83a continuous in the circumferential direction. Corresponding to the annular groove 83a, the outer flanges 85a, 8a
An annular groove 86 of the same size is provided on each end surface of 5b. These rings 83a. O-ring 87 between 86
Is provided to prevent liquid leakage.

The clamp band 84 has the same structure as that of the clamp band 55 described above, and is similar in size to the size of the outer flanges 85a and 85b. Further, the valve body portion 23b of the valve body 23
In the same manner as the third embodiment, the two body annular grooves 35
b and 35c are provided. The other structure is similar to that of the first embodiment described above.

According to the sampling valve 80 of the fourth embodiment, the radial holes 27 of the branch pipe portions 82a and 82b are formed.
Since the lid 83 that closes the a and 27b is fixed by the clamp band 84, the work of attaching and detaching the lid 83 can be performed extremely easily and quickly.

Although the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, an example in which the valve case 21 is provided with two branch pipe portions 30 and 31 has been described. It is also possible to adopt a structure in which three or more branch pipes are provided. Further, in the above embodiment, an example in which the two branch pipe portions 30 and 31 are opposed to each other in the diametrical direction has been described, but it is not always necessary to oppose each other in the diametrical direction.

Further, in the above-mentioned embodiment, the example applied to the sampling valve for sampling the liquid has been described, but the present invention is not limited to this.
The opening / closing port 28 is opened / closed and a plurality of supply / discharge ports 27a, 2a
Any valve device for distributing liquid, switching channels, etc. using 7b can be applied. As described above, the present invention can be variously modified without departing from the spirit thereof.

[0099]

As described above, claim 1 of the present application
According to the described valve device, since one end of the valve cap and one end of the valve case are brought into contact with each other and tightened and fixed by the fixing means, disassembling / assembling work such as cleaning work can be performed quickly and easily. Therefore, it is possible to obtain an effect that a valve device that can be easily maintained and managed can be provided.

According to the valve device of claim 2 of the present application,
By using a pair of holding members connected by hinge means and a clamp band having a clamp bolt and a clamp nut as the fixing means, the fastening work between the valve cap and the valve case and the releasing work thereof can be performed easily and quickly. It is possible to obtain the effect that it can be performed.

According to the valve device of claim 3 of the present application,
By providing the abutting portion with the positioning means including the convex portion and the concave portion that are fitted to each other, when the abutting portion is sandwiched by the fixing means, the positional deviation between the valve case and the valve cap is prevented. As a result, it is possible to obtain the effect of preventing damage to the sealing device.

According to the valve device of claim 4 of the present application,
By adopting a configuration in which a ring-shaped sealing device is attached to the valve head, the valve head can be brought into close contact with the opening / closing port or in the vicinity of the opening / closing port, and the opening / closing port can be reliably closed and opened by the valve head. The effect that can be obtained can be obtained.

According to the valve device of claim 5 of the present application,
By adopting a configuration in which a cap-shaped sealing device is attached to the valve head, the valve head can be brought into close contact with the opening / closing port or in the vicinity of the opening / closing port, and the opening / closing port can be reliably closed and opened by the valve head. The effect that can be obtained can be obtained.

According to the valve device of claim 6 of the present application,
By making the valve head detachable from the valve body, when the sealing performance of the opening and closing port by the valve body deteriorates,
It is possible to deal with this by replacing only the valve head, and it is possible to obtain the effect that the high sealing performance can be easily maintained.

According to the valve device of claim 7 of the present application,
By forming the material of the valve head with a material softer than the material of the valve body having the opening / closing port, it is possible to obtain an effect that a high sealing performance of the opening / closing port by the valve head can be secured.

According to the valve device of claim 8 of the present application,
By providing transparent see-through tubes at multiple supply / discharge ports of the valve case, it is possible to see through the inside of the see-through tube. Therefore, it is possible to see through the see-through tubes whether liquid is present in the transparent case. It is possible to obtain the effect that it can be visually recognized.

According to the valve device of claim 9 of the present application,
By forming the entire valve case or at least a plurality of inlet / outlet ports with a transparent material, it is possible to directly see through the inside of the valve case, and thus it is possible to directly visually check whether or not liquid is present in the valve case. The effect of being recognizable can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a central portion of a valve device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line XX shown in FIG.

FIG. 3 shows a second embodiment of the valve body according to the valve device of the present invention, in which FIG. 3A is a plan view and FIG. 3B is a sectional view.

FIG. 4 shows a third embodiment of the valve body according to the valve device of the present invention, wherein FIG. 4A is a plan view and FIG. 4B is a sectional view.

FIG. 5 is a central longitudinal cross-sectional view showing a second embodiment of the valve device of the present invention.

FIG. 6 is a central longitudinal cross-sectional view showing a third embodiment of the valve device of the present invention.

FIG. 7 is a central longitudinal cross-sectional view showing a fourth embodiment of the valve device of the present invention.

FIG. 8 is a central longitudinal cross-sectional view showing a conventional valve device.

[Explanation of symbols]

20,74,77,80 Sampling valve (valve device), 21,78,81 Valve case, 21a, 21
b, 25b, 61a, 85a, 85b outer flange (contact portion), 22 valve body, 23, 66, 70 valve body, 23a, 66a, 70a valve head portion, 23b, 6
6b, 70b valve body, 24 valve rod, 25 valve cap, 26 handle, 27 axial hole, 2
7a, 27b Radial hole (supply / discharge port), 28 Open / close port,
28a valve seat, 30, 31, 79a, 79b, 82
a, 82b Branch pipe part, 33 Cap with hole, 35a
Head circular groove, 36, 38, 54, 64, 87 O-ring (sealing device), 37 seat ring (sealing device),
39, 43, 44 Seal ring (sealing device), 40
Key, 50 pin (convex portion), 51 engaging hole (concave portion), 55, 84 clamp valve (fixing means), 5
6,57 Clamping member, 58 Clamp bolt, 59
Clamp nut, 60 pipes, 61 mounting pipe,
62 outlet, 67 head cover (sealing device),
75 see-through tube, 76 opening / closing plug, 83 lid

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E070 AA01 AB01 GB16 GB17 GB20                 3H051 AA01 BB02 BB03 CC12 CC14                       CC16 DD02 DD07 FF12

Claims (9)

[Claims] 1. A valve case having an opening / closing port and a plurality of supply / discharge ports communicating with the opening / closing port and communicating with each other; and by rotating the valve case, the valve casing is moved back and forth in an axial direction to open / close the opening / closing port. In a valve device comprising a valve body and a valve cap that rotatably supports the valve body and is fixed to the valve case via fixing means, one end of the valve cap is attached to one end of the valve case. A valve device, characterized in that the valve cap is detachably fixed to the valve case by abutting and tightening the abutting portion with the fixing means. 2. The fixing means includes a pair of holding members, one end of which is rotatably connected by a hinge means, and a clamp bolt and a clamp nut which detachably connect the other ends of the pair of holding members. The valve device according to claim 1, wherein the valve device is a clamp band. 3. The abutment portion is provided with a positioning means including a convex portion and a concave portion that are fitted to each other for positioning between the valve case and the valve cap. The valve device described. 4. A ring-shaped sealing device formed of an elastic member is attached to a valve head portion that opens and closes the opening / closing port of the valve body, and the sealing device is attached to the opening / closing port or near the opening / closing port. The contacting means is characterized in that they are brought into contact with each other.
The valve device described. 5. A cap-shaped sealing device formed of an elastic member is attached to a valve head portion that opens and closes the opening / closing port of the valve body, and the sealing device is attached to the opening / closing port or near the opening / closing port. The valve device according to claim 1, wherein the valve device is brought into contact with the valve device. 6. The valve device according to claim 1, wherein a valve head for opening and closing the opening / closing port of the valve body is configured to be attachable to and detachable from the valve body. 7. The valve device according to claim 6, wherein the valve head portion is formed of a material softer than a material of the valve case forming the opening / closing port. 8. The plurality of supply / discharge ports of the valve case,
2. The valve device according to claim 1, wherein a transparent see-through tube through which the inside can be seen is detachably provided. 9. The valve device according to claim 1, wherein at least the plurality of supply / discharge ports of the valve case are formed of a transparent material through which the inside can be seen.